他很久没谈恋爱了。

Tā hěn jiǔ méi tán liàn'ài le.

He hasn’t been in a relationship for a long time.

他们在谈恋爱。

Tāmen zài tán liàn'ài.

They’re dating.

听说恋爱中的人会特别开心。

Tīngshuō liàn'ài zhōng de rén huì tèbié kāixīn.

I’ve heard that people in love are especially happy.